@TechReport{GleBie_2014,
author = {Aur\'elie Glerum and Michel Bierlaire },
title = {Capturing response behavior heterogeneity in the quantification of semi-open questions: a mixed discrete-continuous approach},
institution = {Transport and Mobility Laboratory, Ecole Polytechnique F\'ed\'erale de Lausanne},
number = {TRANSP-OR 140305},
year = {2014}
}